Hiili – Installation Guide

Before Installation

1. Check that the building’s ventilation gap and underlay are in good condition.
2. Ensure that the panels have acclimatised to site conditions for at least 48 hours.
3. Use stainless steel or hot-dip galvanised fixings.

Installation Steps

1. Battens

Fix vertical battens at 600 mm centres. Use at least 22 × 50 mm battens. Ensure a ventilation gap of at least 25 mm.

2. Panel Fixing

Fix panels from bottom to top. Leave a 2–3 mm gap between panels for thermal expansion.

3. Corners and Junctions

Use metal corner profiles or mitre corners at 45°.

Tools

• Screwdriver / impact driver
• Spirit level
• Cutting tools (mitre saw recommended)
• Stainless steel fixings (screws or nail gun)

Notes

The charred surface does not need treatment before or after installation. Cut ends can be treated with Hiil end-seal paint.